drivers/usb/musb-new/ti-musb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * MISC driver for TI MUSB Glue.
   4  *
   5  * (C) Copyright 2016
   6  *     Texas Instruments Incorporated, <www.ti.com>
   7  */
   8 #include <common.h>
   9 #include <command.h>
  10 #include <console.h>
  11 #include <dm.h>
  12 #include <linux/usb/otg.h>
  13 #include <dm/device-internal.h>
  14 #include <dm/lists.h>
  15
  16 #include <asm/io.h>
  17 #include <asm/omap_musb.h>
  18 #include "musb_uboot.h"
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 #if CONFIG_IS_ENABLED(DM_USB)
  23 /* USB 2.0 PHY Control */
  24 #define CM_PHY_PWRDN                    (1 << 0)
  25 #define CM_PHY_OTG_PWRDN                (1 << 1)
  26 #define OTGVDET_EN                      (1 << 19)
  27 #define OTGSESSENDEN                    (1 << 20)
  28
  29 #define AM335X_USB0_CTRL        0x0
  30 #define AM335X_USB1_CTRL        0x8
  31
  32 static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
  33 {
  34         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
  35
  36         if (!platdata->ctrl_mod_base)
  37                 return;
  38
  39         if (on) {
  40                 clrsetbits_le32(platdata->ctrl_mod_base,
  41                                 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
  42                                 OTGVDET_EN | OTGSESSENDEN);
  43         } else {
  44                 clrsetbits_le32(platdata->ctrl_mod_base, 0,
  45                                 CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
  46         }
  47 }
  48
  49 #if CONFIG_IS_ENABLED(OF_CONTROL)
  50
  51 static int ti_musb_get_usb_index(int node)
  52 {
  53         const void *fdt = gd->fdt_blob;
  54         int i = 0;
  55         char path[64];
  56         const char *alias_path;
  57         char alias[16];
  58
  59         fdt_get_path(fdt, node, path, sizeof(path));
  60
  61         do {
  62                 snprintf(alias, sizeof(alias), "usb%d", i);
  63                 alias_path = fdt_get_alias(fdt, alias);
  64                 if (alias_path == NULL) {
  65                         debug("USB index not found\n");
  66                         return -ENOENT;
  67                 }
  68
  69                 if (!strcmp(path, alias_path))
  70                         return i;
  71
  72                 i++;
  73         } while (alias_path);
  74
  75         return -ENOENT;
  76 }
  77
  78 static int ti_musb_ofdata_to_platdata(struct udevice *dev)
  79 {
  80         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
  81         const void *fdt = gd->fdt_blob;
  82         int node = dev_of_offset(dev);
  83         int phys;
  84         int ctrl_mod;
  85         int usb_index;
  86         struct musb_hdrc_config *musb_config;
  87
  88         platdata->base = (void *)devfdt_get_addr_index(dev, 1);
  89
  90         phys = fdtdec_lookup_phandle(fdt, node, "phys");
  91         ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod");
  92         platdata->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg");
  93         usb_index = ti_musb_get_usb_index(node);
  94         switch (usb_index) {
  95         case 1:
  96                 platdata->ctrl_mod_base += AM335X_USB1_CTRL;
  97                 break;
  98         case 0:
  99                 platdata->ctrl_mod_base += AM335X_USB0_CTRL;
 100                 break;
 101         default:
 102                 break;
 103         }
 104
 105         musb_config = malloc(sizeof(struct musb_hdrc_config));
 106         memset(musb_config, 0, sizeof(struct musb_hdrc_config));
 107
 108         musb_config->multipoint = fdtdec_get_int(fdt, node,
 109                                                  "mentor,multipoint", -1);
 110         if (musb_config->multipoint < 0) {
 111                 pr_err("MUSB multipoint DT entry missing\n");
 112                 return -ENOENT;
 113         }
 114
 115         musb_config->dyn_fifo = 1;
 116
 117         musb_config->num_eps = fdtdec_get_int(fdt, node, "mentor,num-eps",
 118                                               -1);
 119         if (musb_config->num_eps < 0) {
 120                 pr_err("MUSB num-eps DT entry missing\n");
 121                 return -ENOENT;
 122         }
 123
 124         musb_config->ram_bits = fdtdec_get_int(fdt, node, "mentor,ram-bits",
 125                                                -1);
 126         if (musb_config->ram_bits < 0) {
 127                 pr_err("MUSB ram-bits DT entry missing\n");
 128                 return -ENOENT;
 129         }
 130
 131         platdata->plat.config = musb_config;
 132
 133         platdata->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
 134         if (platdata->plat.power < 0) {
 135                 pr_err("MUSB mentor,power DT entry missing\n");
 136                 return -ENOENT;
 137         }
 138
 139         platdata->plat.platform_ops = &musb_dsps_ops;
 140
 141         return 0;
 142 }
 143 #endif
 144
 145 static int ti_musb_host_probe(struct udevice *dev)
 146 {
 147         struct musb_host_data *host = dev_get_priv(dev);
 148         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
 149         struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
 150         int ret;
 151
 152         priv->desc_before_addr = true;
 153
 154         host->host = musb_init_controller(&platdata->plat,
 155                                           NULL,
 156                                           platdata->base);
 157         if (!host->host)
 158                 return -EIO;
 159
 160         ti_musb_set_phy_power(dev, 1);
 161         ret = musb_lowlevel_init(host);
 162
 163         return ret;
 164 }
 165
 166 static int ti_musb_host_remove(struct udevice *dev)
 167 {
 168         struct musb_host_data *host = dev_get_priv(dev);
 169
 170         musb_stop(host->host);
 171         ti_musb_set_phy_power(dev, 0);
 172
 173         return 0;
 174 }
 175
 176 #if CONFIG_IS_ENABLED(OF_CONTROL)
 177 static int ti_musb_host_ofdata_to_platdata(struct udevice *dev)
 178 {
 179         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
 180         const void *fdt = gd->fdt_blob;
 181         int node = dev_of_offset(dev);
 182         int ret;
 183
 184         ret = ti_musb_ofdata_to_platdata(dev);
 185         if (ret) {
 186                 pr_err("platdata dt parse error\n");
 187                 return ret;
 188         }
 189
 190         platdata->plat.mode = MUSB_HOST;
 191
 192         return 0;
 193 }
 194 #endif
 195
 196 U_BOOT_DRIVER(ti_musb_host) = {
 197         .name   = "ti-musb-host",
 198         .id     = UCLASS_USB,
 199 #if CONFIG_IS_ENABLED(OF_CONTROL)
 200         .ofdata_to_platdata = ti_musb_host_ofdata_to_platdata,
 201 #endif
 202         .probe = ti_musb_host_probe,
 203         .remove = ti_musb_host_remove,
 204         .ops    = &musb_usb_ops,
 205         .platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
 206         .priv_auto_alloc_size = sizeof(struct musb_host_data),
 207 };
 208
 209 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
 210 struct ti_musb_peripheral {
 211         struct musb *periph;
 212 };
 213
 214 #if CONFIG_IS_ENABLED(OF_CONTROL)
 215 static int ti_musb_peripheral_ofdata_to_platdata(struct udevice *dev)
 216 {
 217         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
 218         const void *fdt = gd->fdt_blob;
 219         int node = dev_of_offset(dev);
 220         int ret;
 221
 222         ret = ti_musb_ofdata_to_platdata(dev);
 223         if (ret) {
 224                 pr_err("platdata dt parse error\n");
 225                 return ret;
 226         }
 227         platdata->plat.mode = MUSB_PERIPHERAL;
 228
 229         return 0;
 230 }
 231 #endif
 232
 233 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
 234 {
 235         struct ti_musb_peripheral *priv = dev_get_priv(dev);
 236
 237         priv->periph->isr(0, priv->periph);
 238
 239         return 0;
 240 }
 241
 242 static int ti_musb_peripheral_probe(struct udevice *dev)
 243 {
 244         struct ti_musb_peripheral *priv = dev_get_priv(dev);
 245         struct ti_musb_platdata *platdata = dev_get_platdata(dev);
 246         int ret;
 247
 248         priv->periph = musb_init_controller(&platdata->plat,
 249                                             NULL,
 250                                             platdata->base);
 251         if (!priv->periph)
 252                 return -EIO;
 253
 254         ti_musb_set_phy_power(dev, 1);
 255         musb_gadget_setup(priv->periph);
 256         return usb_add_gadget_udc((struct device *)dev, &priv->periph->g);
 257 }
 258
 259 static int ti_musb_peripheral_remove(struct udevice *dev)
 260 {
 261         struct ti_musb_peripheral *priv = dev_get_priv(dev);
 262
 263         usb_del_gadget_udc(&priv->periph->g);
 264         ti_musb_set_phy_power(dev, 0);
 265
 266         return 0;
 267 }
 268
 269 U_BOOT_DRIVER(ti_musb_peripheral) = {
 270         .name   = "ti-musb-peripheral",
 271         .id     = UCLASS_USB_GADGET_GENERIC,
 272 #if CONFIG_IS_ENABLED(OF_CONTROL)
 273         .ofdata_to_platdata = ti_musb_peripheral_ofdata_to_platdata,
 274 #endif
 275         .probe = ti_musb_peripheral_probe,
 276         .remove = ti_musb_peripheral_remove,
 277         .ops    = &musb_usb_ops,
 278         .platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
 279         .priv_auto_alloc_size = sizeof(struct ti_musb_peripheral),
 280         .flags = DM_FLAG_PRE_RELOC,
 281 };
 282 #endif
 283
 284 #if CONFIG_IS_ENABLED(OF_CONTROL)
 285 static int ti_musb_wrapper_bind(struct udevice *parent)
 286 {
 287         const void *fdt = gd->fdt_blob;
 288         int node;
 289         int ret;
 290
 291         for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
 292              node = fdt_next_subnode(fdt, node)) {
 293                 struct udevice *dev;
 294                 const char *name = fdt_get_name(fdt, node, NULL);
 295                 enum usb_dr_mode dr_mode;
 296                 struct driver *drv;
 297
 298                 if (strncmp(name, "usb@", 4))
 299                         continue;
 300
 301                 dr_mode = usb_get_dr_mode(node);
 302                 switch (dr_mode) {
 303                 case USB_DR_MODE_PERIPHERAL:
 304                         /* Bind MUSB device */
 305                         ret = device_bind_driver_to_node(parent,
 306                                                          "ti-musb-peripheral",
 307                                                          name,
 308                                                          offset_to_ofnode(node),
 309                                                          &dev);
 310                         if (ret)
 311                                 pr_err("musb - not able to bind usb peripheral node\n");
 312                         break;
 313                 case USB_DR_MODE_HOST:
 314                         /* Bind MUSB host */
 315                         ret = device_bind_driver_to_node(parent,
 316                                                          "ti-musb-host",
 317                                                          name,
 318                                                          offset_to_ofnode(node),
 319                                                          &dev);
 320                         if (ret)
 321                                 pr_err("musb - not able to bind usb host node\n");
 322                         break;
 323                 default:
 324                         break;
 325                 };
 326         }
 327         return 0;
 328 }
 329
 330 static const struct udevice_id ti_musb_ids[] = {
 331         { .compatible = "ti,am33xx-usb" },
 332         { }
 333 };
 334
 335 U_BOOT_DRIVER(ti_musb_wrapper) = {
 336         .name   = "ti-musb-wrapper",
 337         .id     = UCLASS_MISC,
 338         .of_match = ti_musb_ids,
 339         .bind = ti_musb_wrapper_bind,
 340 };
 341 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
 342
 343 #endif /* CONFIG_IS_ENABLED(DM_USB) */